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cite="mid:39094D58-3326-4339-84AA-26A5745F6F87@sdfe.dk">
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<div class="">On 29 Oct 2018, at 20:20, Robb Main <<a
href="mailto:rmain.mws@gmail.com" class=""
moz-do-not-send="true">rmain.mws@gmail.com</a>>
wrote:</div>
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<div dir="ltr" class="">(…snip…) I'd consider the UTM
zone a part of the OUTPUT, whereas you seem to
consider it part of the required input (lat, long
& UTM zone).
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<div class="">So in my case:</div>
<div class=""> in: lat & long</div>
<div class="">out: UTM zone, easting & northing.</div>
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<div class="">so the process would look more like:</div>
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<div class="">$ echo 6 51 | proj +proj=utm
+zone=auto</div>
<div class="">31 710488.86 5654109.18</div>
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<p><br>
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<p>Actually such operation already exists in EPSG database (not sure
if it exists in Proj4 however). This is the Operation Method
EPSG::9824 - Transverse Mercator Zoned Grid System. The output is
basically:</p>
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<p>E = Z*10^6 + (result of projection for zone Z)</p>
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<p>This is not widely used however.</p>
<p> Martin</p>
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